Emily has $1.24. Joey has $5.36. Maria has $2.42. Do they have enough money to purchase a CD for $9.00?

Question

ul2ph3ojc · Accepted Answer

Yes, they do.
Explanation:
To answer this question, we must first find the total amount of money the three people have all together. Then we can compare that total to the cost of the CD.

1.24 + 5.36 + 2.42 = 9.02

9.02 > 9.00

Since $9.02 is more than $9.00, the three people together do have enough money to purchase a $9.00 CD, assuming there will be no sales tax added to the price.

bemolizisqt · Accepted Answer

The total available cash is $9.02 so they do have enough money.
Solution taken one step at a time showing each stage.
Explanation:
It is much easier sometimes to write the numbers in column form. That is:

\begin{matrix} 1. & 2 & 4 \\ 5. & 3 & 6 \\ 2. & 4 & 2 & \leftarrow add up the columns \end{matrix}

Step 1: add up the rightmost column

4 + 6 + 2 = 12 \to 12

The 2 goes in the right most column and the 1 is included in the adding up of the next left column

\begin{matrix} 1. & 2 & 4 \\ 5. & 3 & 6 \\ 2. & 4 & 2 & \leftarrow add up the columns \\ 2 \\ 1 \end{matrix}

Step 2: add up the next left column

2 + 3 + 4 + 1 \leftarrow don't forget the carried 1

2 + 3 + 4 + 1 = 10 \to 10

\begin{matrix} 1. & 2 & 4 \\ 5. & 3 & 6 \\ 2. & 4 & 2 & \leftarrow add up the columns \\ 0 & 2 \\ 1 & 1 \end{matrix}

Step 3: add up the last column

1 + 5 + 2 + 1 \leftarrow don't forget the carried 1

1 + 5 + 2 + 1 = 9

\begin{matrix} 1. & 2 & 4 \\ 5. & 3 & 6 \\ 2. & 4 & 2 & \leftarrow add up the columns \\ 9. & 0 & 2 & \leftarrow & don't forget the decimal point \\ 1 & 1 \end{matrix}

Emily has $1.24. Joey has $5.36. Maria has $2.42. Do

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